<template>
  <el-container class='home-container'>
    <!--头部区域-->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--侧边区域-->
    <el-container>
      <el-aside :width="isCollapse ? '64px' :'200px'">
        <div class="toggle-button" @click="toggleCollapse" >|||</div>
        <!--侧边栏菜单区域-->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF"
        unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
          <!--一级菜单-->
          <el-submenu :index="item.id +''" v-for="item in menulist" :key="item.id">
            <!--一级菜单模板区域-->
            <template slot="title">
              <!--图标-->
              <i :class="iconsObj[item.id]"></i>
              <!--导航-->
              <span>{{item.authName}}</span>
            </template>
            <!--二级菜单-->
            <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id"
            @click="saveNavState('/' + subItem.path)">
              <template slot="title">
                <!--图标-->
                <i class="el-icon-menu"></i>
                <!--导航-->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--主题区域-->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
  export default {
    data() {
      return {
        menulist: [],
        iconsObj: {
          '125': 'iconfont icon-user',
          '103': 'iconfont icon-tijikongjian',
          '101': 'iconfont icon-shangpin',
          '102': 'iconfont icon-danju',
          '145': 'iconfont icon-baobiao',
        },
        //是否折叠
        isCollapse: false,
        //被激活的链接地址
        activePath:""
      }
    },
    created() {
      this.getMenuList(),
      this.activePath = window.sessionStorage.getItem("activePath")
    },
    methods: {
      logout() {
        window.sessionStorage.clear();
        this.$router.push('/login');
      },
      //获取所有菜单
      async getMenuList() {
        const {
          data: res
        } = await this.$http.get('menus')
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.menulist = res.data
        console.log(res)
      },
      //点击按钮，切换菜单折叠与展开
      toggleCollapse() {
        this.isCollapse = !this.isCollapse
      },
      //保存链接激活状态
      saveNavState(activePath) {
        window.sessionStorage.setItem("activePath",activePath)
        this.activePath = activePath
      }
    }
  }
</script>

<style lang="less" scoped="">
  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-left: 0;
    color: #fff;
    font-size: 20px;

    >div {
      display: flex;
      align-items: center;

      span {
        margin-left: 15px;
      }
    }
  }

  .el-aside {
    background-color: #333744;

   .el-menu {
      border-right: 0;
    }
  }

  .el-main {
    background-color: #eaedf1;
  }

  .home-container {
    height: 100%;
  }

  .iconfont {
    margin-right: 10px;
  }

  .toggle-button {
    background-color: #4A5064;
    font-size: 10px;
    height: 20px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
